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Cloning of cDNA encoding a putative chemoattractant receptor

C Owman¹, C Nilsson, S J Lolait

¹Department of Physiology and Neuroscience, Wallenberg Neuroscience Center, University of Lund, Sweden.

|October 15, 1996

Summary

Researchers identified a novel chemoattractant receptor-like 1 (CMKRL1) in human lymphoid tissues. While its specific ligand remains unknown, its expression suggests a role in regulating the inflammatory system.

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Area of Science:

Molecular Biology
Immunology
Genetics

Background:

G-protein-coupled receptors play crucial roles in cellular signaling, particularly in the immune system.
Chemoattractant receptors are vital for leukocyte trafficking and inflammatory responses.

Purpose of the Study:

To identify and characterize novel chemoattractant receptors involved in human immune cell function.
To determine the gene location and expression patterns of the newly discovered receptor.

Main Methods:

Polymerase chain reaction (PCR) with degenerate primers to screen for G-protein-coupled receptors.
cDNA library screening and Northern blot analysis for gene expression.
Fluorescence in situ hybridization (FISH) for chromosome mapping.
Functional assays in stably transfected mammalian cells to assess receptor activity.

Main Results:

Isolation of a novel cDNA, designated chemoattractant receptor-like 1 (CMKRL1), with homology to chemoattractant receptors.
CMKRL1 gene located on human chromosome 14q11.2-q12, with transcripts found in lymphoid tissues and leukocytes.
Tested chemokines did not elicit reproducible responses in transfected cells, indicating an unidentified ligand.

Conclusions:

CMKRL1 is a novel receptor expressed in human lymphoid cells and tissues.
Despite the inability to identify its ligand among tested chemokines, CMKRL1 likely plays a role in regulating the inflammatory system.